Quiz 2 MON key - BIO325 Genetics Instructor: Dr. Tracey...

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BIO325 Genetics Instructor: Dr. Tracey Ruhlman TA: Teofil Nakov QUIZ 2 Points are given in parentheses after each question. Total points = 20. 1. A diploid plant has a chromosome content of 2n = 4. Each diploid cell has one long pair and one short pair of chromosomes. Diagrammed below are individual cells of a dihybrid plant (A/a; B/b). In each case mention if the diagram represents a cell in mitosis, meiosis I, meiosis II, or not possible . Each line represents a chromatid. (1 pt. each) (a) Not possible (b) Not possible (c) Meiosis II (d) Meiosis I (e) Mitosis a A A a b B B b A A b b A A a a B B b b a A a A b B B b b B b B A A a a A a a A b b B B
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2. Consider the following cross: A/a;B/b;C/c;D/d;E/e x a/a;B/b;C/C;d/d;E/E If there is complete dominance for each of the genes (a) What proportion of the offspring will show the dominant phenotype for each gene? (2.5 points) 1/2 x 3/4 x 1 x 1/2 x 1 = 3/16 ` (b) What proportion of the offspring will be heterozygous at each locus? (2.5 points)
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Quiz 2 MON key - BIO325 Genetics Instructor: Dr. Tracey...

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